Can you better state your question?
are you having a getting into the bios or is it a windows user account.
if it is the bios, simply remove the motherboard battery for a few minutes.
if it is in windows xp, try restarting then tapping F8 before the windows xp loading screen comes up, then after that, boot into safemode and you should see your administrator account and in most cases it is not password protected
if it is also password protected then you will need to go through the trouble of cracking it and I am not sure if this forum allows us to discuss how to do it.